This

Part of speech: pronoun (pron.)

1. As a demonstrative pronoun, this denotes something that is present or near in place or time, or something just mentioned, or that is just about to be mentioned. When they heard this, they were pricked in their heart. Acts ii. 37. But know this, that if the good man of the house had known in what watch the thief would come, he would have watched. Matt. xxiv. 43.

2. As an adjective, this has the same demonstrative force as the pronoun, but is followed by a noun; as, this book; this way to town.